Even if these strangers blithely brush past you, making no attempt to maintain social distancing? Sometimes they'll even come up from behind you, giving you no chance to avoid them.
yes, even then. the likelihood of transmission is still negligibly miniscule. from the virus's perspective, it has to pass a number of gauntlets and a bunch of labyrinths to even reach a position of possible infection. just don't stop and have a conversation without a little distance.